Assigning priorities to data for hybrid drives
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United States of America Patent
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Apr 26, 2016
Grant Date -
Jul 9, 2015
app pub date -
Mar 20, 2015
filing date -
Mar 14, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A hybrid drive includes multiple parts: a performance part (e.g., a flash memory device) and a base part (e.g., a magnetic or other rotational disk drive). A drive access system, which is typically part of an operating system of a computing device, issues input/output (I/O) commands to the hybrid drive to store data to and retrieve data from the hybrid drive. The drive access system assigns, based on various available information, a priority level to groups of data identified by logical block addresses (LBAs). With each I/O command, the drive access system includes an indication of the priority level of the LBA(s) associated with the I/O command. The hybrid drive determines, based on the priority level indications received from the drive access system, which LBAs are stored on which part or parts of the hybrid drive.
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